But I developed so slowly that I began to wonder about space and time only when I was already grown up.

但是我进步的比较慢，于是到我长大我才开始考虑空间与时间的问题。

youdao

Slowly, I have grown up, I only then discovered that the human cannot only live for oneself, must do to the society has the contribution talented person to be good.

慢慢的，我长大了，我才发现，人不能只为自己活着，要做对社会有贡献的人才好。

youdao